Keller, Martina; Oberson, Astrid; Frossard, Emmanuel; Mäder, Paul; Mayer, Jochen and Bünemann, Else K. (2009) Einfluss unterschiedlicher Bewirtschaftungsverfahren auf P-Formen und P-Dynamik im Boden. Poster at: 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.
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Summary
The impact of cropping systems on soil phosphorus (P) forms and P dynamics was
studied. The systems were a biodynamic (DYN), a bioorganic (BIO), a conventional
(CON), a stockless system (MIN) and an unfertilized control (NON). These cropping
systems are part of the DOK field trial in Therwil near Basel. The systems differed in
fertilization and plant protection. The P budgets over 30 years were negative except
for CON and increased in the order: NON < DYN < ORG < MIN < CON. A sequential
P extraction scheme was used to characterize the P forms in soil samples from 2007
and 1977 (before the start of the trial). Labile inorganic P (Pi) forms differed significantly
between cropping systems. Organic P forms (Po) and stable Pi forms were not
affected by the cropping systems apart from Po in concentrated HCl extract. The
comparison between P forms in the soils of 2007 and 1977 revealed depletion in labile
Pi forms in all systems. The changes were related to the P budget. Po changes were
small and thus most of Po appears to be strongly stabilized in the soil.
EPrint Type: | Conference paper, poster, etc. |
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Type of presentation: | Poster |
Keywords: | Phosphor, Boden, Langzeitversuch, DOK-Versuch |
Subjects: | Soil > Nutrient turnover Soil Crop husbandry > Composting and manuring |
Research affiliation: | International Conferences > 2009: Scientific Conference on Organic Agriculture > Pflanze und Boden > Bodenfruchtbarkeit und -biodiversität |
Related Links: | http://www.wissenschaftstagung.de/, http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37 |
Deposited By: | Keller, Martina |
ID Code: | 14255 |
Deposited On: | 15 Apr 2009 |
Last Modified: | 12 Apr 2010 07:37 |
Document Language: | German/Deutsch |
Status: | Published |
Refereed: | Peer-reviewed and accepted |
Additional Publishing Information: | Dieser Beitrag ist im Tagungsband der 10. Wissenschaftagung erschienen: Mayer, J.; Alföldi, T.; Leiber, F.; Dubois, D.; Fried, P.; Heckendorn, F.; Hillmann, E.; Klocke, P.; Lüscher, A.; Riedel, S.; Stolze, M.; Strasser, F.; van der Heijden, M. and Willer, H., (Hrsg.) (2009) Werte – Wege – Wirkungen: Biolandbau im Spannungsfeld zwischen Ernährungssicherung, Markt und Klimawandel. Beiträge zur 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009. Band 1: Boden, Pflanzenbau, Agrartechnik, Umwelt- und Naturschutz, Biolandbau international, Wissensmanagement Band 2: Tierhaltung, Agrarpolitik und Betriebswirtschaft, Märkte und Lebensmittel. Verlag Dr. Köster, Berlin. Der Tagungsband kann beim Verlag Dr. Köster bezogen werden; siehe http://www.verlag-koester.de/buch.php?id=645&start=0&fb_id=37 |
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